Java Mail之六–搜索邮件

时间: 2012-06-29 / 分类: Java学习 / 浏览次数: 855 views / 2个评论 发表评论

JavaMail在javax.mail.search包中定义了一个用于创建搜索条件的SearchTerm类,应用程序创建SearchTerm类的实例对象后,就可以调用Folder.Search(SearchTerm st)方法搜索邮件夹中符合搜索条件的所有邮件。SearchTerm是一个抽象类,JavaMail提供了22个实现子类以帮助应用程序创建不同的搜索条件,这22个类可分为两大类型,如下所示:

1、用于创建逻辑组合关系的类

  • AND条件(AndTerm类)
  • OR条件(OrTerm类)
  • NOT条件(NotTerm类)
  • Comparison条件(ComparisonTerm类)

2、用于创建具体搜索条件的类

  • DATE条件(SentDateTerm、ReceivedDateTerm类)
  • CONTENT条件(BodyTerm类)
  • HEADER条件(FromStringTerm、RecipientStringTerm、SubjectTerm类等)

下面通过实现来说明以上类的用法及含义:

1、搜索发件人为“智联招聘“,而且邮件正文包含“Java工程师“的所有邮件
SearchTerm andTerm = new AndTerm(
	new FromStringTerm("智联招聘"),
	new BodyTerm("java工程师"));
Message[] messages = folder.search(andTerm);

2、搜索发件人为“智联招聘“或主题包含“最新职位信息“的所有邮件

SearchTerm orTerm = new OrTerm(
	new FromStringTerm("智联招聘"),
	new SubjectTerm("最新职位信息"));
Message[] messages = folder.search(orTerm);

3、搜索发件人不包含“智联招聘“所有的邮件

SearchTerm notTerm = new NotTerm(new FromStringTerm("智联招聘"));
Message[] messages = folder.search(notTerm);

4、搜索周一到今天收到的的所有邮件

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, calendar.get(Calendar.DAY_OF_WEEK - (Calendar.DAY_OF_WEEK - 1)) - 1);
Date mondayDate = calendar.getTime();
SearchTerm comparisonTermGe = new SentDateTerm(ComparisonTerm.GE, mondayDate);
SearchTerm comparisonTermLe = new SentDateTerm(ComparisonTerm.LE, new Date());
SearchTerm comparisonAndTerm = new AndTerm(comparisonTermGe, comparisonTermLe);
Message[] messages = folder.search(comparisonAndTerm);

5、搜索大于或等100KB的所有邮件

int mailSize = 1024 * 100;
SearchTerm intComparisonTerm = new SizeTerm(IntegerComparisonTerm.GE, mailSize);
Message[] messages = folder.search(intComparisonTerm);
ComparisonTerm类常用于日期和数字比较中,它使用六个常量EQ(=)、GE(>=)、GT(>)、LE(<=)、LT(<)、NE(!=)来表示六种不同的比较操作。

完整代码:

package org.yangxin.study.jm;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Calendar;
import java.util.Date;
import java.util.Properties;

import javax.mail.Flags.Flag;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import javax.mail.search.AndTerm;
import javax.mail.search.BodyTerm;
import javax.mail.search.ComparisonTerm;
import javax.mail.search.FromStringTerm;
import javax.mail.search.IntegerComparisonTerm;
import javax.mail.search.NotTerm;
import javax.mail.search.OrTerm;
import javax.mail.search.SearchTerm;
import javax.mail.search.SentDateTerm;
import javax.mail.search.SizeTerm;
import javax.mail.search.SubjectTerm;

/**
 * 搜索邮件
 */
public class SearchMailTest {

	public static void main(String[] args) throws Exception {
		Properties props = new Properties();
		props.setProperty("mail.pop3.auth", "true");
		Session session = Session.getInstance(props);
		URLName url = new URLName("pop3", "pop3.163.com", 110, null, "[email protected]", "yX546900873");
		Store store = session.getStore(url);
		store.connect();
		// 得到收件箱
		Folder folder = store.getFolder("INBOX");
		// 以读写模式打开收件箱
		folder.open(Folder.READ_WRITE);

		Message[] messages = search(folder);

		System.out.println("收件箱中共有:" + folder.getMessageCount() + "封邮件,搜索到" + messages.length + "封符合条件的邮件!");

		// 解析邮件搜索到的邮件
		POP3ReceiveMailTest.parseMessage(messages);	

		// 根据用户输入的条件搜索所有邮件,并提示用户是否删除
		//searchDemo(folder);

		folder.close(true);
		store.close();
	}

	public static Message[] search(Folder folder) throws Exception {
		// 搜索主题包含美食的邮件
		String subject = "java培训";
		SearchTerm subjectTerm = new SubjectTerm(subject);

		// 搜索发件人包含支付宝的邮件
		SearchTerm fromTerm = new FromStringTerm("支付宝");

		// 搜索邮件内容包含"招聘"的邮件
		SearchTerm bodyTerm = new BodyTerm("招聘");

		// 搜索发件人不包含“智联招聘”的邮件
		SearchTerm notTerm = new NotTerm(new FromStringTerm("智联招聘"));

		// 搜索发件人为“智联招聘”,而且内容包含“Java工程师“的邮件
		SearchTerm andTerm = new AndTerm(
				new FromStringTerm("智联招聘"),
				new BodyTerm("java工程师"));

		// 搜索发件人为”智联招聘“或主题包含”最新职位信息“的邮件
		SearchTerm orTerm = new OrTerm(
				new FromStringTerm("智联招聘"),
				new SubjectTerm("最新职位信息"));

		// 搜索周一到今天收到的的所有邮件
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.DAY_OF_WEEK, calendar.get(Calendar.DAY_OF_WEEK - (Calendar.DAY_OF_WEEK - 1)) - 1);
		Date mondayDate = calendar.getTime();
		SearchTerm comparisonTermGe = new SentDateTerm(ComparisonTerm.GE, mondayDate);
		SearchTerm comparisonTermLe = new SentDateTerm(ComparisonTerm.LE, new Date());
		SearchTerm comparisonAndTerm = new AndTerm(comparisonTermGe, comparisonTermLe);

		// 搜索大于或等100KB的所有邮件
		int mailSize = 1024 * 100;
		SearchTerm intComparisonTerm = new SizeTerm(IntegerComparisonTerm.GE, mailSize);

		return folder.search(intComparisonTerm);
	}
 }
实例:根据用户输入的收件人(email地址或姓名)和主题作为搜索条件,并提示用户是否删除搜索到的邮件?
/**
	 * 根据用户输入的收件人地址(包括email地址和姓名)和主题作为搜索条件,并提示用户是否删除搜索到的邮件
	 * @param from 收件人
	 * @param subject 主题
	 */
	public static void searchDemo(Folder folder) throws Exception {
		String notifyMsg = "收件箱中一共有" + folder.getMessageCount() + "封邮件。请选择操作:\n";
		notifyMsg += "1、输入收件人\n" + "2、输入主题\n" + "3、开始搜索\n" + "4、退出";
		System.out.println(notifyMsg);
		String from = null;
		String subject = null;
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		String oper = reader.readLine().trim();
		while(!(from != null && subject != null)) {
			if ("4".equals(oper)) {
				System.exit(0);
			} else {
				if ("1".equals(oper)) {
					System.out.print("请输入收件人:");
					from = reader.readLine();
				}  else if ("2".equals(oper)) {
					System.out.print("请输入主题:");
					subject = reader.readLine();
				} else if ("3".equals(oper)) {
					if (from == null || subject == null) {
						System.out.println("未输入搜索条件,无法进行搜索!");
					} else {
						break;
					}
				}
			}
			System.out.print("请选择操作:");
			oper = reader.readLine().trim();
		}

		System.out.println("\n系统正在根据搜索条件查询所有邮件,请稍候......\n");

		// 根据输入的条件,创建SearchTerm实例对象
		SearchTerm orTerm = new OrTerm(
				new FromStringTerm(from),
				new SubjectTerm(subject)
				);

		// 根据搜索条件得到搜索到的邮件列表
		Message[] messages = folder.search(orTerm);

		System.out.println("共搜索到" + messages.length + "封满足搜索条件的邮件!\n\n请选择操作:1、查看邮件\t 2、删除所有邮件");

		String deleteQuestion = "是否要删除搜索到的邮件?(yes/no)";

		String searchResultOper = reader.readLine();

		if ("1".equals(searchResultOper)) {
			for (Message message : messages) {
				MimeMessage msg = (MimeMessage) message;
				String sub = POP3ReceiveMailTest.getSubject(msg);
				System.out.println("开始查看第" + msg.getMessageNumber() + "封邮件...");
				System.out.println("主题: " + sub);
				System.out.println("发件人: " + POP3ReceiveMailTest.getFrom(msg));
				System.out.println("收件人:" + POP3ReceiveMailTest.getReceiveAddress(msg, null));
				System.out.println("发送时间:" + POP3ReceiveMailTest.getSentDate(msg, null));
				System.out.println(deleteQuestion);
				String answer = reader.readLine();
				if ("yes".equals(answer)) {
					msg.setFlag(Flag.DELETED, true);
					System.out.println("邮件[" + sub + "]删除成功!");
				} else if ("no".equals(answer)) {
					System.out.println("第" + msg.getMessageNumber() + "封邮件查看完成!");
				} else if ("stop".equals(answer)) {
					System.exit(0);
				}
				System.out.println();
			}
		} else {
			System.out.println(deleteQuestion);
			String answer = reader.readLine();
			if ("yes".equals(answer)) {
				for (Message message : messages) {
					String sub = MimeUtility.decodeText(message.getSubject());
					message.setFlag(Flag.DELETED, true);
					System.out.println("邮件[" + sub + "]删除成功!");
				}
			}
		}
	}
搜索结果:
1、搜索条件,收件人:智联招聘    主题:最新招聘信息 
2、搜索条件,收件人:支付宝   主题:信用卡

 



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